A method for controlling a power steering system (2) of a road vehicle (9) includes: after the road vehicle (9) is started, activating only an EPS subsystem (24); afterward, activating an EHPS subsystem (25) when a speed of the road vehicle (9) is not higher than a predetermined speed threshold; once the EHPS subsystem (25) is activated, controlling the hydraulic motor (252) of the EHPS subsystem (25) to rotate at a rotational speed lower than a pre-set rotational speed when a torque applied to a steering column (22) is smaller than a predetermined torque threshold.

Applied Country	Category	專利狀態	證書號	專利權期間	研究成果公告日期
CN	Chassis steering technology	獲證	CN109955891B	2021/04/30~2037/12/24
US	Chassis steering technology	獲證	CN109955891B	2021/04/30~2037/12/24
TW	Chassis steering technology	獲證	CN109955891B	2021/04/30~2037/12/24